Film blowing device for film production

Abstract

The utility model discloses a film blowing device for film production. The film blowing device comprises a film blowing machine rack, the two limiting rings are both arranged on the film blowing machine rack, and the two limiting rings are arranged in a manner that the whole limiting rings face each other; the plurality of openings are respectively formed in the two limiting rings; the plurality of limiting structures are respectively arranged in the plurality of openings; and the adjusting structure is arranged on the film blowing machine rack. By means of the limiting ring and the limiting wheel, the film is stably limited in the blowing process, shaking of the film is effectively prevented, the processing effect of the device on the film is guaranteed, and the film quality problem possibly caused by shaking is avoided.

Description

Technical Field

[0001] This utility model relates to the field of thin film blowing technology, and specifically to a blown film device for thin film production. Background Technology

[0002] A blown film machine is a device that heats and melts plastic particles, then blows them into thin films using a blow molding process. Its working principle is mainly based on the processes of plastic melting, blowing, cooling, and traction. Specifically, dry plastic particles such as polyethylene are added to the hopper, where they gradually melt under the push of a screw. The molten plastic is filtered through the die head to remove impurities, then extruded from the die head and blown into a thin film by the airflow provided by an air compressor. Subsequently, the film is cooled and solidified by a cooling device, and finally drawn and wound into a cylindrical finished product by a traction system and a winding device.

[0003] A significant drawback of existing blown film equipment is the lack of an effective restraining structure for the film. During the blown film process, the film expands into a columnar structure under the influence of airflow. This unrestrained expansion can lead to uneven film thickness and affect film flatness. More importantly, the film is prone to swaying under strong airflow. This swaying not only affects the production quality of the film, causing problems such as wrinkles and tears, but also increases the instability and uncertainty of the production process, reducing production efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a blown film device for thin film production.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A blown film production apparatus, comprising:

[0007] Film blowing machine frame;

[0008] Both limiting rings are mounted on the blown film machine frame, and the two limiting rings are arranged facing each other directly downwards;

[0009] Several openings are respectively formed on the two limiting rings;

[0010] Several limiting structures are respectively disposed in several of the openings;

[0011] An adjustment structure is installed on the blown film machine frame.

[0012] As a further embodiment of this utility model: the limiting structure includes:

[0013] The sliding rod is slidably disposed within the opening;

[0014] The wheel frame is fixed to one end of the sliding rod located inside the limiting ring;

[0015] A limiting wheel is rotatably mounted on the wheel frame;

[0016] A collar is fixedly sleeved on the end of the sliding rod located outside the limiting ring;

[0017] The spring has one end connected to the limiting ring and the other end connected to the collar.

[0018] As a further embodiment of this utility model: the adjustment structure includes:

[0019] An adjustment cover is installed on the blown film machine frame. Both ends of the adjustment cover are open. The top opening of the adjustment cover is larger than the bottom opening. The adjustment cover is positioned directly opposite the limiting ring located at the lower end.

[0020] Both fixing blocks are fixed to the adjusting cover;

[0021] An adjusting screw is rotatably mounted on the blown film machine frame, and one of the fixing blocks is threadedly sleeved on the adjusting screw;

[0022] The guide rod is fixed on the blown film machine frame, and another fixing block is slidably sleeved on the guide rod.

[0023] As a further embodiment of this invention, the openings located on the same limiting ring are distributed in a circumferential array.

[0024] As a further embodiment of this utility model: the outer surface of the sliding rod and the inner surface of the opening are in contact with each other.

[0025] As a further embodiment of this invention, the limiting wheel is made of rubber material.

[0026] The beneficial effects of this utility model are:

[0027] 1. Through the setting of the limiting ring and limiting wheel structure, the film is stably limited during the blowing process, effectively preventing the film from shaking. This not only ensures the processing effect of the device on the film, but also avoids the film quality problems that may be caused by shaking. The limiting wheel is made of rubber material and can rotate when in contact with the moving film. This design greatly reduces the friction and damage of the limiting wheel to the film, protects the integrity of the film, and improves the yield of the product.

[0028] 2. Operators can easily adjust the position of the limit wheel by rotating the adjusting screw. This function enables the device to adapt to the production needs of films of different sizes, improving the versatility and flexibility of the equipment. The special design of the adjusting cover and the use of springs make the position adjustment of the limit wheel more precise and smooth. When the adjusting cover moves, the sliding rods can move synchronously under the action of the springs and move away from or closer to each other, thereby achieving precise adjustment of the position of the limit wheel. This design simplifies the operation process and improves work efficiency. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a schematic diagram of two limiting rings and several limiting structures;

[0032] Figure 3 yes Figure 2 Enlarged view of the structure at point A.

[0033] In the diagram: 1. Blown film machine frame; 2. Limiting ring; 3. Opening; 4. Connecting rod; 51. Sliding rod; 52. Wheel frame; 53. Limiting wheel; 54. Collar; 55. Spring; 61. Adjusting cover; 62. Fixing block; 63. Adjusting screw; 64. Guide rod. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] like Figure 1-3 As shown, a blown film production device includes a blown film machine frame 1; two limiting rings 2, both of which are set on the blown film machine frame 1, and the two limiting rings 2 are arranged facing each other; a plurality of openings 3 are respectively opened on the two limiting rings 2, and the openings 3 located on the same limiting ring 2 are arranged in a circumferential array, and the upper and lower limiting rings 2 are connected by a plurality of connecting rods 4.

[0036] Several limiting structures are respectively set in several openings 3. The limiting structures include: a sliding rod 51, which is slidably set in the opening 3, and the outer surface of the sliding rod 51 is in contact with the inner surface of the opening 3; a wheel frame 52, which is fixed to one end of the sliding rod 51 located inside the limiting ring 2; a limiting wheel 53, which is rotatably mounted on the wheel frame 52 and is made of rubber material; a collar 54, which is fixedly sleeved on one end of the sliding rod 51 located outside the limiting ring 2; and a spring 55, one end of which is connected to the limiting ring 2 and the other end of which is connected to the collar 54. Under the limiting action of the limiting wheels 53, the film will not shake during the blowing process, which can ensure the processing effect of the device on the film. For the limiting structure, when the limiting wheel 53 comes into contact with the moving film, the limiting wheel 53 can rotate, which can prevent the limiting wheel 53 from damaging the film. In addition, the limiting wheel 53 is made of rubber material, which can also prevent the limiting wheel 53 from damaging the film.

[0037] An adjustment structure, mounted on the blown film machine frame 1, includes: an adjustment cover 61, mounted on the blown film machine frame 1, with both ends of the adjustment cover 61 being open (3), the top opening (3) being larger than the bottom opening (3), and the adjustment cover 61 being positioned directly opposite the lower limiting ring 2; two fixing blocks 62, both fixed to the adjustment cover 61; an adjustment screw 63, rotatably mounted on the blown film machine frame 1, with one fixing block 62 threaded onto the adjustment screw 63; and a guide rod 64, fixed to the blown film machine frame 1, with the other fixing block 62 slidably mounted on the guide rod 64. Rotating the adjusting screw 63, under the limiting action of the guide rod 64, the adjusting screw 63 can drive the corresponding fixed block 62 to move, which causes the adjusting cover 61 to move accordingly. Both ends of the adjusting cover 61 are open 3, and the top opening 3 of the adjusting cover 61 is larger than the bottom opening 3. Therefore, when the adjusting cover 61 moves downward, the adjusting cover 61 no longer squeezes the sliding rods 51. At this time, the sliding rods 51 will move synchronously and move away from each other under the action of the corresponding spring 55. When the adjusting cover 61 squeezes the sliding rods 51, the sliding rods 51 can move synchronously and move closer to each other.

[0038] The working principle of this utility model:

[0039] When the blown film device for film production proposed in this utility model is in use, the film blown by the airflow passes through two limiting rings 2. Several limiting structures are provided on the two limiting rings 2. Under the limiting action of several limiting wheels 53, the film will not shake during the blowing process, which can ensure the processing effect of the device on the film. As for the limiting structure, when the limiting wheel 53 comes into contact with the moving film, the limiting wheel 53 can rotate, which can prevent the limiting wheel 53 from damaging the film. In addition, the limiting wheel 53 is made of rubber material, which can also prevent the limiting wheel 53 from damaging the film.

[0040] The operator can adjust the positions of several limiting wheels 53 according to the size of the film. Specifically, the operator rotates the adjusting screw 63. Under the limiting action of the guide rod 64, the rotation of the adjusting screw 63 can drive the corresponding fixed block 62 to move, which causes the adjusting cover 61 to move accordingly. Both ends of the adjusting cover 61 are open 3, and the top opening 3 of the adjusting cover 61 is larger than the bottom opening 3. Therefore, when the adjusting cover 61 moves downward, the adjusting cover 61 no longer squeezes the several sliding rods 51. At this time, the several sliding rods 51 will move synchronously and move away from each other under the action of the corresponding spring 55. When the adjusting cover 61 squeezes the several sliding rods 51, the several sliding rods 51 can move synchronously and move away from each other. Since they are close to each other, the operator can adjust the position of several limiting wheels 53 by rotating the adjusting screw 63, so that the several limiting wheels 53 can provide limiting for films of different sizes. It should be noted that two limiting rings 2 are designed in this solution. For the film located inside the blown film machine frame 1, the two limiting rings 2 respectively provide limiting for the film located at the upper and lower ends of the blown film machine frame 1, which can effectively prevent the film from shaking. The adjustment principle of the adjustment structure is applicable to several limiting structures on the lower limiting ring 2. For several limiting structures on the upper limiting ring 2, the same adjustment method can be used. Since the adjustment principle is the same, it is not shown in the figure and will not be described in detail here.

[0041] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A blown film production apparatus, characterized in that, The utility model relates to a kind of film blowing machine frame (1);Two limiting rings (2) are arranged on the film blowing machine frame (1), and the two limiting rings (2) are arranged in whole down opposite;Several openings (3) are respectively opened in the two limiting rings (2);Several limiting structures are respectively arranged in several openings (3);Adjusting structure is arranged on the film blowing machine frame (1). The limiting structure includes: sliding rod (51) is slidably arranged in the opening (3);Wheel carrier (52) is fixed in the one end of sliding rod (51) in limiting ring (2);Limiting wheel (53) is rotatably installed on the wheel carrier (52);Sleeve ring (54) is fixedly sleeved in the one end of sliding rod (51) outside limiting ring (2);Spring (55) is connected with limiting ring (2) in one end, and is connected with sleeve ring (54) in other end. The adjusting structure includes: adjusting cover (61) is arranged on the film blowing machine frame (1), and the two ends of adjusting cover (61) are all in the shape of opening (3), the top opening (3) of adjusting cover (61) is greater than bottom opening (3), and adjusting cover (61) is opposite to the limiting ring (2) in lower end and is arranged;Two fixed blocks (62) are fixed on adjusting cover (61);Adjusting screw rod (63) is rotatably installed on the film blowing machine frame (1), and one of the fixed blocks (62) is threadedly sleeved on adjusting screw rod (63);Guide rod (64) is fixed on the film blowing machine frame (1), and the other fixed block (62) is slidably sleeved on guide rod (64). The opening (3) on the same limiting ring (2) is distributed in circumferential array. The outer surface of the sliding rod (51) and the inner surface of the opening (3) are mutually fitted. The limiting wheel (53) is made of rubber material.

2. The film blowing device for film production according to claim 1, characterized by ​ ​ ​ ​ ​ ​ 3. The film blowing device for film production according to claim 1, characterized in that, ​ ​ ​ ​ ​ 4. The film blowing device for film production according to claim 1, characterized in that, ​ 5. The film blowing apparatus for film production according to claim 2, wherein ​ 6. The film blowing device for film production according to claim 2, wherein ​

Images